Common troubleshooting

If you can start Spork manually but get the following error message when using Guard::Spork:

Starting Spork for RSpec ERROR: Could not start Spork for RSpec/Cucumber. Make sure you can use it manually first.

Try to increase the value of the :wait => 60 option before any further investigation.
It's possible that this error is the result of an unnecessary /test directory in the root of your application. Removing the /test directory entirely may resolve this error.